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macro(GIT_VERSION_GEN)
include(FindGit)
if(NOT GIT_FOUND)
message(FATAL_ERROR "This is not a git repository")
endif()
find_program(SORT "sort")
mark_as_advanced(SORT)
if (${SORT} STREQUAL "")
message(FATAL_ERROR "Cannot find the sort executable")
endif()
find_program(TAIL "tail")
mark_as_advanced(TAIL)
if (${TAIL} STREQUAL "")
message(FATAL_ERROR "Cannot find the tail executable")
endif()
execute_process(
COMMAND ${GIT_EXECUTABLE} tag -l -n0
COMMAND ${SORT} -V
COMMAND ${TAIL} -n 1
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
OUTPUT_VARIABLE _git_tag
RESULT_VARIABLE _git_result
OUTPUT_STRIP_TRAILING_WHITESPACE)
if(NOT ${_git_result} EQUAL 0)
message(FATAL_ERROR "Cannot fetch repository tag")
endif()
message(STATUS "Repository tag is: ${_git_tag}")
string(REGEX REPLACE
"[^0-9]*([0-9]+)\\.[0-9]+.*" "\\1"
_version_major "${_git_tag}")
string(REGEX REPLACE
"[^0-9]*[0-9]+\\.([0-9]+).*" "\\1"
_version_minor "${_git_tag}")
set(PACKAGE_VERSION_MAJOR "${_version_major}")
set(PACKAGE_VERSION_MINOR "${_version_minor}")
endmacro(GIT_VERSION_GEN)
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